| 摘要 |
A phase current integration method for diagnosing a fault in a switched reluctance motor power converter. A diagnosis about whether the main switch of a switched reluctance motor power converter is experiencing a short circuit or an open circuit fault is made by measuring a phase current iO(t) transient value of said converter in a non-fault state as well as a present phase current i(t) transient value of said converter, so as to obtain, by means of an integration operation, an integration value SnO of a phase current during a certain period under the non-fault state, and an integration value Sn of a phase current during a certain period under a present state, the ratio En of the two values, i.e. En＝Sn/SnO, indicating a fault characteristic value. The invention may be used in switched reluctance motor power converters having multiple phases and multiple topographies. The invention allows for accurate location of faults and has excellent engineering application value. |
